What is the probability that the system contains at least one customer?
A)0.25
B)0.55
C)0.75
D)0.45

Question

Quizplus · Accepted Answer

The probability that a customer arrives in the system is 0.5. Using the complement rule, the probability that no customer arrives is 1-0.5=0.5. Therefore, the probability that the system contains at least one customer is 1-0.5 = 0.5. Since 0.5 is greater than 0.25, 0.45 and 0.55, the best choice is C) 0.75.

What Is the Probability That the System Contains at Least